This is a project expanded from a greenfield Java project named Duke. Given below are instructions on how to use it.

Prerequisites: JDK 11, update Intellij to the most recent version.

1. Open Intellij (if you are not in the welcome screen, click File > Close Project to close the existing project first)
2. Open the project into Intellij as follows:
   1. Click Open.
   2. Select the project directory, and click OK.
   3. If there are any further prompts, accept the defaults.
3. Configure the project to use JDK 11 (not other versions) as explained in here.
   In the same dialog, set the Project language level field to the SDK default option.
4. After that, locate the src/main/java/Duke.java file, right-click it, and choose Run Duke.main() (if the code editor is showing compile errors, try restarting the IDE). If the setup is correct, you should see the application as shown below: